Ricoh Aficio 450 developer unit problem

[m_donakov]

So when developer unit is out of the machine and when I manually turn the wheels then it is fine toner has deployed everywhere Nowhere is white. After that when you return the unit back developer first 200 copies are good. After 200 copies began to appear white on one side of the sheet. When take out the developer unit situation is like the pictures. The hole where you have to enter is full of toner to the end while the side is white as the wheels of the images.

Regrads
Mile

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[Eric1968]

The development unit is overtoned. Replace the developer and check if the mixing augers turn smoothly.

[mikadonovan]

It sounds like you might have an auger gear or shaft broken preventing the developer from spreading itself evenly through the dev unit. I'm assuming the machine is level and not tilted towards the operator side.